Hello, I recently picked up my GS4 off ebay and have been loving it. I want to root in order to get things like setCPU (if that's still a thing), Google Wallet, and other root features. My problem is I wish to stay on touchwiz and keep the features that came with my stock phone, such as smart stay, scroll etc. If I root can I keep all of the stock features and then just 'add' the root features? Will rooting affect over-the-air updates, or is that only ROMs?